AR-15, M-16 & M-16A1

5.56MM RIFLES

 

M16A2 Specifications

 

  • CALIBER .223 REM (5.56 MM NATO)
  • MODES OF FIRE: SAFE/SEMI/AUTO/BURST
  • 20/30/40 ROUND MAGAZINE
  • 39.25" OVERALL LENGTH
  • 20" BARREL LENGTH
  • RIFLING - 1 IN 7" OR 1 IN 9" OR 1 IN 12"
  • WEIGHT W/O MAG. - 7.5 LBS (3.4 KG)
  • WEIGHT W/LOADED MAG. - 8.75 LBS (4 KG)

Weight US CUSTOMARY METRIC
Rifle M16A2, without magazine and sling 7.2 lb 3.40 kg
Sling; adjustable 4 oz 0.11 kg
Empty magazine 4 oz 0.11 kg
Loaded magazine 1 lb 1 oz 0.46 kg
Rifle M16A2 w/sling and loaded magazine 8.75 lb 3.97 kg
Bayonet-Knife M7 10.5 oz 0.30 kg
Scabbard M10 5 oz 0.14 kg
Length
Rifle with compensator 39.625 in 100.65 cm
Barrel 20 in 50.8 cm
Barrel with compensator 21 in 53.34 cm
Mechanical features
Rifling right-hand twist 6 grooves 1:7
Method of operation direct gas
Type of breach mechanism rotating bolt
Method of feeding magazine
Cooling air
Trigger pull 5.5 to 9.5 lb 2.49 to 4.31 kg
Ammunition
Caliber .223 5.56 mm
Type ball,blank,dummy,tracer
Firing characteristics
Muzzle velocity (approx) 3,100 fps 94,488 cmps
Muzzle engergy 1,322 ft-lb 1,785 N-m
Chamber pressure 52,000 psi 358,540 kPa
Cyclic rate of fire (approx) 800 rds/m
Maximum rate of fire
Semiautomatic 45 rds/m
Burst 90 rds/m
Sustained rate of fire 12/15 rds/m
Maximum range 3,938 yds 3,600 meters
Maximum effective range
Individual point targets 602 yds 550 meters
Area targets 875 yds 800 meters

AR-15 Parts Diagram

Accessories

.22 Conversion Kits

If you are like most AR-15 owners, there are many days that have gone by when you have thought to yourself "How can I shoot my AR-15 more for less money?" I wish I could spend all day at the range and not have to concern myself with the cost of .223 Rem. I believe it is every AR-15 owner�s wish to have an endless supply of .223 Rem ammunition to put through his or her favorite rifle. But with financial resources they way they are for most of us, this is simply not a realistic possibility.

Reloading your own .223 Rem ammunition is a partial answer to this wish of shooting more for less, but requires a commitment of a substantial amount of time and finances for a reloading machine, dies, powder, brass, bullets, etc. Reloading is fun and relatively economical (compared to shooting factory ammunition), but is definitely not for everyone. I personally enjoy reloading very much at times, but there are other times when I do not want to go to the time and effort of reloading all those rounds. Additionally, shooting hundreds of even reloaded .223 Rem rounds still carries somewhat of a heavy price tag.

Well, if you are an AR-15 owner that has gone through the above-mentioned thought processes, there is a path to AR-15 plinking nirvana. And the path is paved with...you guessed it...ammunition in the form of the ubiquitous and economical .22LR cartridge.

The Conversion Unit Answer

Ciener .22LR Conversion Kit for the AR-15 and M16

Ciener .22LR Conversion Kit for the AR-15 and M16

A .22LR conversion unit transforms your high-power centerfire AR-15 into a .22 rimfire plinker for a cost of between $125.00 to $225.00. The current crop of conversion units, from a variety of manufacturers, are simple to install and function reliably. As a side note, most of the units do suggest that you utilize high-velocity .22LR cartridges to ensure reliable functioning.

With a conversion kit from one of the three manufacturers listed below, you can plink for hours for a mere $15.00 or so 500 rounds of .22LR ammunition. Shooting a "converted" AR-15 is both fun and economical. It�s a great way to practice with your AR-15 rifle for extended shooting periods without breaking the bank. It�s also a fantastic way to introduce your non-shooting friends to the AR-15 rifle as there is little-to-no recoil whatsoever.

A conversion unit will replace your existing AR-15 bolt-carrier and bolt. The conversion process takes all of about 30 seconds with the AR-15. You simply punch out the rear take down pin, pull back on the charging handle, slip out the bolt carrier and bolt, and slip in the conversion unit. Reassemble the upper and lower, and insert the conversion unit�s magazine loaded with .22LR cartridges. And that�s it! The .22LR rounds will fire through your existing .223 barrel. No further modifications are necessary.

Be aware that each conversion unit manufacturer has essentially its own proprietary magazine design. This means, if at all possible, you should buy a few extra magazines at the time of your conversion unit purchase. In the long run, this will save you a lot of time and aggravation. For the most part, you will not find spare magazines at your local gun shop or show.

The Conversion Units and Vendors

There are currently 3 conversion units available on the market for the AR-15 rifle. They are chambered for .22LR only. What follows is a list of the brands and vendors.

1.

Colt Sporter .22LR Conversion Kit for AR-15 Rifles

Manufacturer: Colt�s Manufacturing Co., P.O. Box 1868, Hartford CT
203-236-6311
http://www.colt.com (website)
  • Production: The kit and magazines (10 rd) are no longer in production by Colt, but new units are still occasionally available on the market. Check Shotgun News & Gun List for vendors.
  • Unit Cost: $ 175.00 (Bob Swanson) kit comes with 1 magazine (as supplied from factory).
  • Magazines: $ 20.00 (YTM Distributors), $ 28.00 (Bob Swanson)
Vendors:
1. Bob Swanson, Tucson AZ, Tel. 520-299-3454
  • Comments: Good customer service. Bob did not have any more Colt kits for sale as of the beginning of 1998. But, he did have some of the kit�s magazines left for $28/pc.
2. YTM Distributors, Inc., 20464-F Chartwell Center Dr., Cornelius NC 28031. Tel. 704-895-8649.
  • Comments: Has magazines for the Colt .22LR conversion unit for $20/pc.
2.

"Atchisson" Mk III .22LR Conversion Unit for AR-15

Manufacturer: Jonathan Arthur Ciener, Inc., 8700 Commerce Street, Cape Canaveral Fl 32920

407-868-2200 (phone)
407-868-2201 (fax)
http://www.22lrconversions.com (website)
  • Production: Currently in production.
  • Unit Costs: $ 139.00 w/10 rd Mag., $ 179.00 w/30 rd Mag.
  • Magazines: $ 23.00 Spare 20 rd Mag, $ 59.00 Spare 30 rd Mag (3 for $149.00)
Vendor: Manufacturer direct.

3.

U.S. GI M261 AR15/M16 Rifle Conversion Kit (GI Issue) U.S. Air Force Conversion Units

Manufacturer: Saco Defense Industries, U.S. Government Contract

  • Production: Status Unknown. Continued contract production is not believed to be ongoing as the US military is not actively utilizing the .22LR conversion units for training as originally envisioned.
  • Unit Costs: $ 124.75 (SARCO, Inc.) w/3 10-round Magazines, U.S. Army Units (blowback only). $ 195.00 (SARCO, Inc.) w/1 10-round Magazine. U.S.A.F. Conversion Units, (combination gas/blowback functioning).
  • Magazines: $ 11.95 (SARCO, Inc. Offered ONLY to purchasers of their kits), $ 25.00 (Bob Swanson)
Vendors:
1. Sarco, Inc., 323 Union St., PO Box 98, Stirling, NJ 07980
908-647-3800 (phone)
908-647-9413 (fax)
info@sarcoinc.com (e-mail)
http://www.sarcoinc.com (website)
  • Comments: The quality of this vendor�s customer service has been widely disputed on the AR-15 list. Use of Credit Card or Certified Funds is suggested.
2. Bob Swanson, Tucson AZ, Tel. 520-299-3454
  • Comments: Bob�s advertisement in Gun List of April 1998 read: AR-15 CONVERSION kit, .22LR,original US military, new with two 10rd magazines, $225.00. Additional magazines $25. This is probably, judging by the price, the USAF Conversion Unit. You should confirm this with the vendor. Bob Swanson gets good marks from people on the AR-15 list

 

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